Means for applying silicate to corrugated strawpaper



Jan. 12 1926. 1,569,073

c. E. COLGROVE MEANS FOR APPLYING SILICATE TO CORRUGATED STRAWPAPER Filed Oct. 11, 1923 Attorney Patented Jan. 12, 1926.

UNITED STATES CHARLES EVERETT COLGROVE, 03s TORGNTG, ONTARIO, CANADA.

MEANS FOR APPLYING SILICATE TO CORRUGATED STRAWPAPER.

Application filed October 11, 1923.

r of which the following is a specification.

Statement 0 f invention.

This invention relates to improvements in means for applying silicate to corrugated straw-paper, and to corrugated paper board manufacturing means generally, as described in the present specification and shown in the accompanying drawings.

The invention consists essentially of the novel features pointed out broadly and specifically in the claim for novelty following a description in detail of an acceptable form of the invention.

To facilitate a thorough comprehension of my invention, I shall refer briefly to the prior art, in which the usual silicate rolls pick up the silicate from the silicate pan and apply a thin film thereof upon a transfor roll, which applies the same to the tips of the corrugated straw-paper as it is fed from the corrugating machine.

Any adhesive in excess of the quantity necessary to form a bond along the line of contact of the tips of the corrugated strawpaper and the liner is a waste, and to obviate this the tips of the corrugation are directed downwardly when the silicate is applied, so that the adhesive will tend to flow towards, rather than away from the line of contact.

In some machines the first liner is applied while the straw-paper is still on one of the corrugated rolls, or the liner may be brought up into contact with the corrugated straw-paper and the two together pass over a platform which dries it and sets the silicate. In such mechanisms the single faced web must be turned back over the machine and passed through a second unit of machines to invert the web so that the ordinary straw-paper may be permanently secured to the corrugated straw-paper, thus forming a smooth surface.

The objects of my invention are, with the foregoing in View, to provide means for ap Serial No. 667,887.

obviating the possibilities of applying an excess of silicate to the tips of the corrugations; to provide means whereby the silicate may be applied to the straw-paper as the same is fed in a horizontal plane from the corrugator, thereby obviating the necessity of employing additional mechanisms for carrying the web back over the corrugator and inverting it for the purpose described; to bring about a churning action of the silicate to promote its adhesive qualities; to provide means for adjusting the relation of the instrumentalities constituting such a mechanism so that the amount of silicate applied to the straw-paper may be regulated in accordance with the specific requirements; and generally to provide a structure with a view to compactness and durability, wherein the number of parts are few, the construction simple, and the cost of maintenance low.

The drawing is a fragmentary sectional elevation illustrating the association of the instrumentalities constituting my invention.

General construction.

My invention may be built into a corrugating machine or may be used as an independent unit in advance of the corrugator to receive the web as it is fed therefrom. In the drawing I have illustrated relation of the instrumentalities constituting my invention, it being understood that the same extend transversally of the machine parallel with the corrugations of the straw-pais intended to include a pan, vat or any equivalent means for containing a quantity of silicate of soda. A very brief description of the silicate pan to which the attachment of this invention is applied will suffice, since the particular type of such pan is immaterial to the invention which has a wide range of applicability to various kinds of machines, irrespective of the speclfic form of the said silicate pan, per so.

In the drawing is illustrated silicate pan 1 of any desired formation, to the ends of Which are connected the castings 2 and 3.

The term silicate pan as used herein,

Said castings are perforated as at 4 to receive extremities of the spindle or shaft 5 which serves to. zcarrythe pick-up roll 6. For the purpose of illustration, the said 'roll may be driven from overhead line shaft through the mediumof; the belt 7 trained over the pulley wheel 8 mounted upon the spindle 5.

The numerals 9 and 10 designate the intermediate and transfer rolls respectively which are carried upon spindles 11 and 12 journaled"in adjustable bearings 13 carried uponthe end castingsQ-and 3. The intermediate roll '9 is rotated incidental to theintermeshing of thepinion lt'carried upon the'spindle ll' and the spur gear 15positioned on the-spindle 5, and its rotating action is-transmitted'to the'transfer roll 10 incidental to the intermeshing of the pinion lat andthe pinion 16carried upon the spindle 12. The adjustable ournals as illustrated provide means for adjusting the '-intermediate rolls, and'the transfer roll in relation to. the web ofcorrugated straw-board which is fed therebeneath as illustrated, and indicated in itsentirety by the numerals 19.

' General operation}? transfer roll 10 applies the film of silicate,

upon the tips 180f the corrugated strawpaper 19, and the straw-paper and the web is advanced'to receive the upper or'second" liner;

The travel ofthe silicate about theintermediate'and' transfer rolls serves to bring about a churning action of thesilicate to produce the desiredadhesive qualities. The employment of the intermediate roll obliterates the possibility of applying excessive silicate to the tips or the corrugations, due to the fact that any surplussilicate which mayhave fedfrom' the'pick-up roll" to the intermediate roll and to the transfer roll,

will be returned to the transfer roll and to the pick-up roll, as is described.

, Assuming that the pick-up rollis rotatmg in the direction of the indicating arrow A, the film of silicate pick-up will be applied at the point of contact B, the intermediate roll rotating in the direction of the indicating arrow C. The film of silicate is transferred from the intermediate roll 9 to the transfer roll lOat'the point of contact D, the transfer roll rotating in the. direction of the indicating arrow E. The film of silicate is applied to the tipslS of the corrugations 19 a'ttheposition indicated by F, and any excessive film adhering to the roll will be carried back to the location indicated by D and transferred to the intermediate roll 9, which will serve to convey the same back to the pick-up roll 6 and tothe silicate. pan 1. It is obvious that the introduction of the intermediate roll 9 not only serves to effeet a churning actionzto promote the adheslveness of the silicate but. to provide means for applying the required amount of silicate to thetips of the straw-paper in the manner illustrated, which obviates the necessity of employing considerable collateral mechanismand' factory space to accommodate for same.

A perusal offthe preceding elucidation is deemed suflicient to enable one skilled in the art to readily comprehend the novelty and desirability of my invention, and that deviations from such detail in its precise formaT tion and association of parts may be resorted to without forming a departure from the. spirit of th'ccinvention and the scope of the appendedclaim. i

What I claim is:

In means for applyingsilicate to corru gated straw-paper, comprising a driver dip; ping roller, and a tank containing the silicate,- an intermediateroller receiving its sili-' cate' in contact with said dipping roller, an application and feed, roller below said intermediate-roller receiving its silicate in contact with thelatter, gears rigidly secured to said rollers and intermeshing one with the other, and means providing a path through the machine under said feedand application roller for the passage of the corrugatedpaper and adapted topermit actuating engagement of, the corrugations wiltlh the teeth of the gear on said feed r0 er. I

CHARLES EVERETT, corenovn 

